#ifndef _MPolyMessage
#define _MPolyMessage
//-
// ==========================================================================
// Copyright (C) 1995 - 2006 Autodesk, Inc., and/or its licensors.  All
// rights reserved.
//
// The coded instructions, statements, computer programs, and/or related
// material (collectively the "Data") in these files contain unpublished
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// and by international treaties.
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// The Data may not be disclosed or distributed to third parties or be
// copied or duplicated, in whole or in part, without the prior written
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// including the above license grant, this restriction and the following
// disclaimer, must be included in all copies of the Software, in whole
// or in part, and all derivative works of the Software, unless such copies
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// code generated by a source language processor.

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//+
//
// CLASS:    MPolyMessage
//
// ****************************************************************************

#if defined __cplusplus

// ****************************************************************************
// INCLUDED HEADER FILES


#include <maya/MMessage.h>
#include <maya/MString.h>

// ****************************************************************************
// DECLARATIONS

class MUintArray;
class MObject;

// ****************************************************************************
// CLASS DECLARATION (MPolyMessage)

//! \ingroup OpenMaya
//! \brief Polygon component id change messages. 
/*!
	This class is used to register callbacks for poly component
	id modification messages.

	There is 1 add callback method which will add callbacks for the
	following messages:

		\li <b>vertex component id modified</b>
		\li <b>edge component id modified</b>
		\li <b>face component id modified</b>

    To remove a callback use MMessage::removeCallback.
	All callbacks that are registered by a plug-in must be removed by that
	plug-in when it is unloaded. Failure to do so will result in a fatal error.
*/
class OPENMAYA_EXPORT MPolyMessage : public MMessage
{
public:
	//! Values passed in addPolyComponentIdChangeCallback's
	//! "wantIdModifications" array to indicate which component
	//! id changes should trigger the callback.
	enum
	{
		kVertexIndex = 0,	//!< vertex component id changed
		kEdgeIndex = 1,		//!< edge component id changed
		kFaceIndex = 2,		//!< face component id changed
		kLastErrorIndex = 3	//!< \nop
	};

	static MCallbackId	addPolyComponentIdChangedCallback (
								MObject& node,
								bool wantIdModifications[],
								unsigned int count,
								MMessage::MComponentFunction func,
								void * clientData = NULL,
								MStatus * ReturnStatus = NULL);

	static MCallbackId	addPolyTopologyChangedCallback (
								MObject& node,
								MMessage::MNodeFunction func,
								void * clientData = NULL,
								MStatus * ReturnStatus = NULL);

	static unsigned int deletedId( void );

	static const char* className();
};

#endif /* __cplusplus */
#endif /* _MPolyMessage */
